Biden jabs Roberts for oath flub

[cnn-photo-caption image= http://i2.cdn.turner.com/cnn/2009/images/01/21/art.biden.gi.jpg caption="Biden couldn't pass up poking fun at Chief Justice Roberts."]

(CNN) - Vice President Biden isn't letting Supreme Court Chief Justice John Roberts forget about his minor flub while administering the presidential oath of office on Tuesday.

Biden made light of the mishap Wednesday as he was called on to swear in senior members of the White House staff.

"My memory is not as good as Justice Roberts, Chief Justice Roberts," Biden said as he asked for a copy of the oath to read.

Several staffers reacted to the comment with groans and laughter, though President Obama, standing next to Biden, did not crack a smile.

Roberts' mistake came about half way through the 35-word oath, when, reciting from memory, he said the word 'faithfully,' out of order. The flub confused Obama who ultimately repeated the mistake.

But speaking to ABC Tuesday night, the new president didn't fault the man who swore him in.

"We're up there, we've got a lot of stuff on our mind, and he actually helped me out on a couple of stanzas there," he said. "So overall, I think it went relatively smoothly and I'm very grateful to him."